Dougie McDonald says it was his assistant referee Steven Craven who suggested lying about a decision during a Dundee United-Celtic match.
Craven resigned after the game, unhappy at emphasis placed on his role in a rescinded Celtic penalty.
He then told newspapers he colluded with McDonald to lie about how the changed decision was reached.
McDonald confirmed Craven's claims but argued it was in fact the assistant's idea to change their version of events.
McDonald awarded a penalty to Celtic at 1-1 in the match they eventually went on to win 2-1 at Tannadice on 17 October, before changing the award after speaking to linesman Craven.
The referee felt he had made a mistake, and asked Craven for confirmation, but the pair subsequently misled the match's referee's supervisor, Jim McBurney, saying that it was in fact the assistant who influenced the decision.
